文摘
In this study, a hard-templating route was developed to synthesize a 3D reticular Lib>1.2b>Nib>0.2b>Mnb>0.6b>Ob>2b> cathode material using ordered mesoporous silica as the hard template. The synthesized 3D reticular Lib>1.2b>Nib>0.2b>Mnb>0.6b>Ob>2b> microparticles consisted of two interlaced 3D nanonetworks and a mesopore channel system. When used as the cathode material in a lithium-ion battery, the as-synthesized 3D reticular Lib>1.2b>Nib>0.2b>Mnb>0.6b>Ob>2b> exhibited remarkably enhanced electrochemical performance, namely, superior rate capability and better cycling stability than those of its bulk counterpart. Specifically, a high discharge capacity of 195.6 mA h g–1 at 1 C with 95.6% capacity retention after 50 cycles was achieved with the 3D reticular Lib>1.2b>Nib>0.2b>Mnb>0.6b>Ob>2b>. A high discharge capacity of 135.7 mA h g–1 even at a high current of 1000 mA g–1 was also obtained. This excellent electrochemical performance of the 3D reticular Lib>1.2b>Nib>0.2b>Mnb>0.6b>Ob>2b> is attributed to its designed structure, which provided nanoscale lithium pathways, large specific surface area, good thermal and mechanical stability, and easy access to the material center.